We got our XXL and tried our first few jobs. One would complete and then one would go for about 15% and then just stop and sit there. Same symptoms as yours. Next two jobs, same thing. It just stopped moving somewhere along the job. No rhyme or reason.
Research showed us that it was really sensitive to power and data line fluctuations. We bought a 120V line conditioner and one for our USB port as well.
I’ve done 3 big jobs now with no problems. I may be something you want to explore.
I used to get this a similar issued before going to a new version of the board. I have a feeling it might be something slightly simpler - my USB port on my Mac is usb c - I have to use an adapter and I think it’s not a solid connection. I wasn’t having the issue on my PC. Admittedly since I haven’t been able to run jobs on my PC recently I haven’t ran any jobs recently.